/*****************************************************************************

Copyright (C) 2006  Nick Baicoianu



This program is free software; you can redistribute it and/or

modify it under the terms of the GNU General Public License

as published by the Free Software Foundation; either version 2

of the License, or (at your option) any later version.



This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU General Public License for more details.



You should have received a copy of the GNU General Public License

along with this program; if not, write to the Free Software

Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

*****************************************************************************/

//constructor for the main Epoch class (ENGLISH VERSION)

function Epoch(name,mode,targetelement,multiselect)

{

	this.state = 0;

	this.name = name;

	this.curDate = new Date();

	this.mode = mode;

	this.selectMultiple = (multiselect == true); //'false' is not true or not set at all

	

	//the various calendar variables

	//this.selectedDate = this.curDate;

	this.selectedDates = new Array();

	this.calendar;

	this.calHeading;

	this.calCells;

	this.rows;

	this.cols;

	this.cells = new Array();

	

	//The controls

	this.monthSelect;

	this.yearSelect;

	

	//standard initializations

	this.mousein = false;

	this.calConfig();

	this.setDays();

	this.displayYear = this.displayYearInitial;

	this.displayMonth = this.displayMonthInitial;

	

	this.createCalendar(); //create the calendar DOM element and its children, and their related objects

	

	if(this.mode == 'popup' && targetelement && targetelement.type == 'text') //if the target element has been set to be an input text box

	{

		this.tgt = targetelement;

		this.calendar.style.position = 'absolute';

		this.topOffset = this.tgt.offsetHeight; // the vertical distance (in pixels) to display the calendar from the Top of its input element

		this.leftOffset = 0; 					// the horizontal distance (in pixels) to display the calendar from the Left of its input element

		this.calendar.style.top = this.getTop(targetelement) + this.topOffset + 'px';

		this.calendar.style.left = this.getLeft(targetelement) + this.leftOffset + 'px';

		document.body.appendChild(this.calendar);

		this.tgt.calendar = this;

		this.tgt.onfocus = function () {this.calendar.show();}; //the calendar will popup when the input element is focused

		this.tgt.onblur = function () {if(!this.calendar.mousein){this.calendar.hide();}}; //the calendar will popup when the input element is focused

	}

	else

	{

		this.container = targetelement;

		this.container.appendChild(this.calendar);

	}

	

	this.state = 2; //0: initializing, 1: redrawing, 2: finished!

	this.visible ? this.show() : this.hide();

}

//-----------------------------------------------------------------------------

Epoch.prototype.calConfig = function () //PRIVATE: initialize calendar variables

{

	//this.mode = 'flat'; //can be 'flat' or 'popup'

	this.displayYearInitial = this.curDate.getFullYear(); //the initial year to display on load

	this.displayMonthInitial = this.curDate.getMonth(); //the initial month to display on load (0-11)

	this.rangeYearLower = 1950;

	this.rangeYearUpper = 2050;

	this.minDate = new Date(1950,0,1);

	this.maxDate = new Date(2050,0,1);

	this.startDay = 0; // the day the week will 'start' on: 0(Sun) to 6(Sat)

	this.showWeeks = true; //whether the week numbers will be shown

	this.selCurMonthOnly = false; //allow user to only select dates in the currently displayed month

	this.clearSelectedOnChange = true; //whether to clear all selected dates when changing months

	

	//flat mode-only settings:

	//this.selectMultiple = true; //whether the user can select multiple dates (flat mode only)



	switch(this.mode) //set the variables based on the calendar mode

	{

		case 'popup': //popup options

			this.visible = false;

			break;

		case 'flat':

			this.visible = true;

			

			break;

	}

	this.setLang();

};

//-----------------------------------------------------------------------------

Epoch.prototype.setLang = function()  //all language settings for Epoch are made here.  Check Date.dateFormat() for the Date object's language settings

{

	this.daylist = new Array('Su','Mo','Tu','We','Th','Fr','Sa','Su','Mo','Tu','We','Th','Fr','Sa'); /*<lang:en>*/

	this.months_sh = new Array('Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec');

	this.monthup_title = 'Go to the next month';

	this.monthdn_title = 'Go to the previous month';

	this.clearbtn_caption = 'Clear';

	this.clearbtn_title = 'Clears any dates selected on the calendar';

	this.maxrange_caption = 'This is the maximum range';

};

//-----------------------------------------------------------------------------

Epoch.prototype.getTop = function (element) //PRIVATE: returns the absolute Top value of element, in pixels

{

    var oNode = element;

    var iTop = 0;

    

    while(oNode.tagName != 'BODY') {

        iTop += oNode.offsetTop;

        oNode = oNode.offsetParent;

    }

    

    return iTop;

};

//-----------------------------------------------------------------------------

Epoch.prototype.getLeft = function (element) //PRIVATE: returns the absolute Left value of element, in pixels

{

    var oNode = element;

    var iLeft = 0;

    

    while(oNode.tagName != 'BODY') {

        iLeft += oNode.offsetLeft;

        oNode = oNode.offsetParent;        

    }

    

    return iLeft;

};

//-----------------------------------------------------------------------------

Epoch.prototype.show = function () //PUBLIC: displays the calendar

{

	this.calendar.style.display = 'block';

	this.visible = true;

};

//-----------------------------------------------------------------------------

Epoch.prototype.hide = function () //PUBLIC: Hides the calendar

{

	this.calendar.style.display = 'none';

	this.visible = false;

};

//-----------------------------------------------------------------------------

Epoch.prototype.toggle = function () //PUBLIC: Toggles (shows/hides) the calendar depending on its current state

{

	if(this.visible) {

		this.hide();

	}

	else {

		this.show();

	}

};

//-----------------------------------------------------------------------------

Epoch.prototype.setDays = function ()  //PRIVATE: initializes the standard Gregorian Calendar parameters

{

	this.daynames = new Array();

	var j=0;

	for(var i=this.startDay; i< this.startDay + 7;i++) {

		this.daynames[j++] = this.daylist[i];

	}

		

	this.monthDayCount = new Array(31,((this.curDate.getFullYear() - 2000) % 4 ? 28 : 29),31,30,31,30,31,31,30,31,30,31);

};

//-----------------------------------------------------------------------------

Epoch.prototype.setClass = function (element,className) //PRIVATE: sets the CSS class of the element, W3C & IE

{

	element.setAttribute('class',className);

	element.setAttribute('className',className); //<iehack>

};

//-----------------------------------------------------------------------------

Epoch.prototype.createCalendar = function ()  //PRIVATE: creates the full DOM implementation of the calendar

{

	var tbody, tr, td;

	this.calendar = document.createElement('table');

	this.calendar.setAttribute('id',this.name+'_calendar');

	this.setClass(this.calendar,'calendar');

	//to prevent IE from selecting text when clicking on the calendar

	this.calendar.onselectstart = function() {return false;};

	this.calendar.ondrag = function() {return false;};

	tbody = document.createElement('tbody');

	

	//create the Main Calendar Heading

	tr = document.createElement('tr');

	td = document.createElement('td');

	td.appendChild(this.createMainHeading());

	tr.appendChild(td);

	tbody.appendChild(tr);

	

	//create the calendar Day Heading

	tr = document.createElement('tr');

	td = document.createElement('td');

	td.appendChild(this.createDayHeading());

	tr.appendChild(td);

	tbody.appendChild(tr);



	//create the calendar Day Cells

	tr = document.createElement('tr');

	td = document.createElement('td');

	td.setAttribute('id',this.name+'_cell_td');

	this.calCellContainer = td;	//used as a handle for manipulating the calendar cells as a whole

	td.appendChild(this.createCalCells());

	tr.appendChild(td);

	tbody.appendChild(tr);

	

	//create the calendar footer

	tr = document.createElement('tr');

	td = document.createElement('td');

	td.appendChild(this.createFooter());

	tr.appendChild(td);

	tbody.appendChild(tr);

	

	//add the tbody element to the main calendar table

	this.calendar.appendChild(tbody);



	//and add the onmouseover events to the calendar table

	this.calendar.owner = this;

	this.calendar.onmouseover = function() {this.owner.mousein = true;};

	this.calendar.onmouseout = function() {this.owner.mousein = false;};

};

//-----------------------------------------------------------------------------

Epoch.prototype.createMainHeading = function () //PRIVATE: Creates the primary calendar heading, with months & years

{

	//create the containing <div> element

	var container = document.createElement('div');

	container.setAttribute('id',this.name+'_mainheading');

	this.setClass(container,'mainheading');

	//create the child elements and other variables

	this.monthSelect = document.createElement('select');

	this.yearSelect = document.createElement('select');

	var monthDn = document.createElement('input'), monthUp = document.createElement('input');

	var opt, i;

	//fill the month select box

	for(i=0;i<12;i++)

	{

		opt = document.createElement('option');

		opt.setAttribute('value',i);

		if(this.state == 0 && this.displayMonth == i) {

			opt.setAttribute('selected','selected');

		}

		opt.appendChild(document.createTextNode(this.months_sh[i]));

		this.monthSelect.appendChild(opt);

	}

	//and fill the year select box

	for(i=this.rangeYearLower;i<=this.rangeYearUpper;i++)

	{

		opt = document.createElement('option');

		opt.setAttribute('value',i);

		if(this.state == 0 && this.displayYear == i) {

			opt.setAttribute('selected','selected');

		}

		opt.appendChild(document.createTextNode(i));

		this.yearSelect.appendChild(opt);		

	}

	//add the appropriate children for the month buttons

	monthUp.setAttribute('type','button');

	monthUp.setAttribute('value','>');

	monthUp.setAttribute('title',this.monthup_title);

	monthDn.setAttribute('type','button');

	monthDn.setAttribute('value','<');

	monthDn.setAttribute('title',this.monthdn_title);

	this.monthSelect.owner = this.yearSelect.owner = monthUp.owner = monthDn.owner = this;  //hack to allow us to access this calendar in the events (<fix>??)

	

	//assign the event handlers for the controls

	monthUp.onmouseup = function () {this.owner.nextMonth();};

	monthDn.onmouseup = function () {this.owner.prevMonth();};

	this.monthSelect.onchange = function() {

		this.owner.displayMonth = this.value;

		this.owner.displayYear = this.owner.yearSelect.value; 

		this.owner.goToMonth(this.owner.displayYear,this.owner.displayMonth);

	};

	this.yearSelect.onchange = function() {

		this.owner.displayMonth = this.owner.monthSelect.value;

		this.owner.displayYear = this.value; 

		this.owner.goToMonth(this.owner.displayYear,this.owner.displayMonth);

	};

	

	//and finally add the elements to the containing div

	container.appendChild(monthDn);

	container.appendChild(this.monthSelect);

	container.appendChild(this.yearSelect);

	container.appendChild(monthUp);

	return container;

};

//-----------------------------------------------------------------------------

Epoch.prototype.createFooter = function () //PRIVATE: creates the footer of the calendar - goes under the calendar cells

{

	var container = document.createElement('div');

	var clearSelected = document.createElement('input');

	clearSelected.setAttribute('type','button');

	clearSelected.setAttribute('value',this.clearbtn_caption);

	clearSelected.setAttribute('title',this.clearbtn_title);

	clearSelected.owner = this;

	clearSelected.onclick = function() { this.owner.resetSelections(false);};

	container.appendChild(clearSelected);

	return container;

};

//-----------------------------------------------------------------------------

Epoch.prototype.resetSelections = function (returnToDefaultMonth)  //PRIVATE: reset the calendar's selection variables to defaults

{

	this.selectedDates = new Array();

	this.rows = new Array(false,false,false,false,false,false,false);

	this.cols = new Array(false,false,false,false,false,false,false);

	if(this.tgt)  //if there is a target element, clear it too

	{

		this.tgt.value = '';

		if(this.mode == 'popup') {//hide the calendar if in popup mode

			this.hide();

		}

	}

		

	if(returnToDefaultMonth == true) {

		this.goToMonth(this.displayYearInitial,this.displayMonthInitial);

	}

	else {

		this.reDraw();

	}

};

//-----------------------------------------------------------------------------

Epoch.prototype.createDayHeading = function ()  //PRIVATE: creates the heading containing the day names

{

	//create the table element

	this.calHeading = document.createElement('table');

	this.calHeading.setAttribute('id',this.name+'_caldayheading');

	this.setClass(this.calHeading,'caldayheading');

	var tbody,tr,td;

	tbody = document.createElement('tbody');

	tr = document.createElement('tr');

	this.cols = new Array(false,false,false,false,false,false,false);

	

	//if we're showing the week headings, create an empty <td> for filler

	if(this.showWeeks)

	{

		td = document.createElement('td');

		td.setAttribute('class','wkhead');

		td.setAttribute('className','wkhead'); //<iehack>

		tr.appendChild(td);

	}

	//populate the day titles

	for(var dow=0;dow<7;dow++)

	{

		td = document.createElement('td');

		td.appendChild(document.createTextNode(this.daynames[dow]));

		if(this.selectMultiple) { //if selectMultiple is true, assign the cell a CalHeading Object to handle all events

			td.headObj = new CalHeading(this,td,(dow + this.startDay < 7 ? dow + this.startDay : dow + this.startDay - 7));

		}

		tr.appendChild(td);

	}

	tbody.appendChild(tr);

	this.calHeading.appendChild(tbody);

	return this.calHeading;	

};

//-----------------------------------------------------------------------------

Epoch.prototype.createCalCells = function ()  //PRIVATE: creates the table containing the calendar day cells

{

	this.rows = new Array(false,false,false,false,false,false);

	this.cells = new Array();

	var row = -1, totalCells = (this.showWeeks ? 48 : 42);

	var beginDate = new Date(this.displayYear,this.displayMonth,1);

	var endDate = new Date(this.displayYear,this.displayMonth,this.monthDayCount[this.displayMonth]);

	var sdt = new Date(beginDate);

	sdt.setDate(sdt.getDate() + (this.startDay - beginDate.getDay()) - (this.startDay - beginDate.getDay() > 0 ? 7 : 0) );

	//create the table element

	this.calCells = document.createElement('table');

	this.calCells.setAttribute('id',this.name+'_calcells');

	this.setClass(this.calCells,'calcells');

	var tbody,tr,td;

	tbody = document.createElement('tbody');

	for(var i=0;i<totalCells;i++)

	{

		if(this.showWeeks) //if we are showing the week headings

		{

			if(i % 8 == 0)

			{

				row++;

				tr = document.createElement('tr');

				td = document.createElement('td');

				if(this.selectMultiple) { //if selectMultiple is enabled, create the associated weekObj objects

					td.weekObj = new WeekHeading(this,td,sdt.getWeek(),row)

				}

				else //otherwise just set the class of the td for consistent look

				{

					td.setAttribute('class','wkhead');

					td.setAttribute('className','wkhead'); //<iehack>

				}

				td.appendChild(document.createTextNode(sdt.getWeek()));			

				tr.appendChild(td);

				i++;

			}

		}

		else if(i % 7 == 0) //otherwise, new row every 7 cells

		{

			row++;

			tr = document.createElement('tr');

		}

		//create the day cells

		td = document.createElement('td');

		td.appendChild(document.createTextNode(sdt.getDate()));// +' ' +sdt.getUeDay()));

		var cell = new CalCell(this,td,sdt,row);

		this.cells.push(cell);

		td.cellObj = cell;

		sdt.setDate(sdt.getDate() + 1); //increment the date

		tr.appendChild(td);

		tbody.appendChild(tr);

	}

	this.calCells.appendChild(tbody);

	this.reDraw();

	return this.calCells;

};

//-----------------------------------------------------------------------------

Epoch.prototype.reDraw = function () //PRIVATE: reapplies all the CSS classes for the calendar cells, usually called after chaning their state

{

	this.state = 1;

	var i,j;

	for(i=0;i<this.cells.length;i++) {

		this.cells[i].selected = false;

	}

	for(i=0;i<this.cells.length;i++)

	{

		for(j=0;j<this.selectedDates.length;j++) { //if the cell's date is in the selectedDates array, set its selected property to true

			if(this.cells[i].date.getUeDay() == this.selectedDates[j].getUeDay() ) {

				this.cells[i].selected = true;

			}

		}



		this.cells[i].setClass();

	}

	//alert(this.selectedDates);

	this.state = 2;

};

//-----------------------------------------------------------------------------

Epoch.prototype.deleteCells = function () //PRIVATE: removes the calendar cells from the DOM (does not delete the cell objects associated with them

{

	this.calCellContainer.removeChild(this.calCellContainer.firstChild); //get a handle on the cell table (optional - for less indirection)

	this.cells = new Array(); //reset the cells array

};

//-----------------------------------------------------------------------------

Epoch.prototype.goToMonth = function (year,month) //PUBLIC: sets the calendar to display the requested month/year

{

	this.monthSelect.value = this.displayMonth = month;

	this.yearSelect.value = this.displayYear = year;

	this.deleteCells();

	this.calCellContainer.appendChild(this.createCalCells());

};

//-----------------------------------------------------------------------------

Epoch.prototype.nextMonth = function () //PUBLIC: go to the next month.  if the month is december, go to january of the next year

{

	

	//increment the month/year values, provided they're within the min/max ranges

	if(this.monthSelect.value < 11) {

		this.monthSelect.value++;

	}

	else

	{

		if(this.yearSelect.value < this.rangeYearUpper)

		{

			this.monthSelect.value = 0;

			this.yearSelect.value++;

		}

		else {

			alert(this.maxrange_caption);

		}

	}

	//assign the currently displaying month/year values

	this.displayMonth = this.monthSelect.value;

	this.displayYear = this.yearSelect.value;

	

	//and refresh the calendar for the new month/year

	this.deleteCells();

	this.calCellContainer.appendChild(this.createCalCells());

};

//-----------------------------------------------------------------------------

Epoch.prototype.prevMonth = function () //PUBLIC: go to the previous month.  if the month is january, go to december of the previous year

{

	//increment the month/year values, provided they're within the min/max ranges

	if(this.monthSelect.value > 0)

		this.monthSelect.value--;

	else

	{

		if(this.yearSelect.value > this.rangeYearLower)

		{

			this.monthSelect.value = 11;

			this.yearSelect.value--;

		}

		else {

			alert(this.maxrange_caption);

		}

	}

	

	//assign the currently displaying month/year values

	this.displayMonth = this.monthSelect.value;

	this.displayYear = this.yearSelect.value;

	

	//and refresh the calendar for the new month/year

	this.deleteCells();

	this.calCellContainer.appendChild(this.createCalCells());

};

//-----------------------------------------------------------------------------

Epoch.prototype.addZero = function (vNumber) //PRIVATE: pads a 2 digit number with a leading zero

{

	return ((vNumber < 10) ? '0' : '') + vNumber;

};

//-----------------------------------------------------------------------------

Epoch.prototype.addDates = function (dates,redraw)  //PUBLIC: adds the array "dates" to the calendars selectedDates array (no duplicate dates) and redraws the calendar

{

	var j,in_sd;

	for(var i=0;i<dates.length;i++)

	{	

		in_sd = false;

		for(j=0;j<this.selectedDates.length;j++)

		{

			if(dates[i].getUeDay() == this.selectedDates[j].getUeDay())

			{

				in_sd = true;

				break;

			}

		}

		if(!in_sd) { //if the date isn't already in the array, add it!

			this.selectedDates.push(dates[i]);

		}

	}

	if(redraw != false) {//redraw  the calendar if "redraw" is false or undefined

		this.reDraw();

	}

};

//-----------------------------------------------------------------------------

Epoch.prototype.removeDates = function (dates,redraw)  //PUBLIC: adds the dates to the calendars selectedDates array and redraws the calendar

{

	var j;

	for(var i=0;i<dates.length;i++)

	{

		for(j=0;j<this.selectedDates.length;j++)

		{

			if(dates[i].getUeDay() == this.selectedDates[j].getUeDay()) { //search for the dates in the selectedDates array, removing them if the dates match

				this.selectedDates.splice(j,1);

			}

		}

	}

	if(redraw != false) { //redraw  the calendar if "redraw" is false or undefined

		this.reDraw();

	}

};

//-----------------------------------------------------------------------------

Epoch.prototype.outputDate = function (vDate, vFormat) //PUBLIC: outputs a date in the appropriate format (DEPRECATED)

{

	var vDay			= this.addZero(vDate.getDate()); 

	var vMonth			= this.addZero(vDate.getMonth() + 1); 

	var vYearLong		= this.addZero(vDate.getFullYear()); 

	var vYearShort		= this.addZero(vDate.getFullYear().toString().substring(3,4)); 

	var vYear			= (vFormat.indexOf('yyyy') > -1 ? vYearLong : vYearShort);

	var vHour			= this.addZero(vDate.getHours()); 

	var vMinute			= this.addZero(vDate.getMinutes()); 

	var vSecond			= this.addZero(vDate.getSeconds()); 

	return vFormat.replace(/dd/g, vDay).replace(/mm/g, vMonth).replace(/y{1,4}/g, vYear).replace(/hh/g, vHour).replace(/nn/g, vMinute).replace(/ss/g, vSecond);

};

//-----------------------------------------------------------------------------

Epoch.prototype.updatePos = function (target) //PUBLIC: moves the calendar's position to target's location (popup mode only)

{

	this.calendar.style.top = this.getTop(target) + this.topOffset + 'px'

	this.calendar.style.left = this.getLeft(target) + this.leftOffset + 'px'

}

//-----------------------------------------------------------------------------



/*****************************************************************************/

function CalHeading(owner,tableCell,dow)

{

	this.owner = owner;

	this.tableCell = tableCell;

	this.dayOfWeek = dow;

	

	//the event handlers

	this.tableCell.onclick = this.onclick;

}

//-----------------------------------------------------------------------------

CalHeading.prototype.onclick = function ()

{

	//reduce indirection:

	var owner = this.headObj.owner;

	var sdates = owner.selectedDates;

	var cells = owner.cells;

	

	owner.cols[this.headObj.dayOfWeek] = !owner.cols[this.headObj.dayOfWeek];

	for(var i=0;i<cells.length;i++) //cycle through all the cells in the calendar, selecting all cells with the same dayOfWeek as this heading

	{

		if(cells[i].dayOfWeek == this.headObj.dayOfWeek && (!owner.selCurMonthOnly || cells[i].date.getMonth() == owner.displayMonth && cells[i].date.getFullYear() == owner.displayYear)) //if the cell's DoW matches, with other conditions

		{

			if(owner.cols[this.headObj.dayOfWeek]) 		//if selecting, add the cell's date to the selectedDates array

			{

				if(owner.selectedDates.arrayIndex(cells[i].date) == -1) { //if the date isn't already in the array

					sdates.push(cells[i].date);

				}

			}

			else										//otherwise, remove it

			{

				for(var j=0;j<sdates.length;j++) 

				{

					if(cells[i].dayOfWeek == sdates[j].getDay())

					{

						sdates.splice(j,1);	//remove dates that are within the displaying month/year that have the same day of week as the day cell

						break;

					}

				}

			}

			cells[i].selected = owner.cols[this.headObj.dayOfWeek];

		}

	}

	owner.reDraw();

};

/*****************************************************************************/

function WeekHeading(owner,tableCell,week,row)

{

	this.owner = owner;

	this.tableCell = tableCell;

	this.week = week;

	this.tableRow = row;

	this.tableCell.setAttribute('class','wkhead');

	this.tableCell.setAttribute('className','wkhead'); //<iehack>

	//the event handlers

	this.tableCell.onclick = this.onclick;

}

//-----------------------------------------------------------------------------

WeekHeading.prototype.onclick = function ()

{

	//reduce indirection:

	var owner = this.weekObj.owner;

	var cells = owner.cells;

	var sdates = owner.selectedDates;

	var i,j;

	owner.rows[this.weekObj.tableRow] = !owner.rows[this.weekObj.tableRow];

	for(i=0;i<cells.length;i++)

	{

		if(cells[i].tableRow == this.weekObj.tableRow)

		{

			if(owner.rows[this.weekObj.tableRow] && (!owner.selCurMonthOnly || cells[i].date.getMonth() == owner.displayMonth && cells[i].date.getFullYear() == owner.displayYear)) //match all cells in the current row, with option to restrict to current month only

			{

				if(owner.selectedDates.arrayIndex(cells[i].date) == -1) {//if the date isn't already in the array

					sdates.push(cells[i].date);

				}

			}

			else										//otherwise, remove it

			{

				for(j=0;j<sdates.length;j++)

				{

					if(sdates[j].getTime() == cells[i].date.getTime())  //this.weekObj.tableRow && sdates[j].getMonth() == owner.displayMonth && sdates[j].getFullYear() == owner.displayYear)

					{

						sdates.splice(j,1);	//remove dates that are within the displaying month/year that have the same day of week as the day cell

						break;

					}

				}

			}

		}

	}

	owner.reDraw();

};

/*****************************************************************************/

//-----------------------------------------------------------------------------

function CalCell(owner,tableCell,dateObj,row)

{

	this.owner = owner;		//used primarily for event handling

	this.tableCell = tableCell; 			//the link to this cell object's table cell in the DOM

	this.cellClass;			//the CSS class of the cell

	this.selected = false;	//whether the cell is selected (and is therefore stored in the owner's selectedDates array)

	this.date = new Date(dateObj);

	this.dayOfWeek = this.date.getDay();

	this.week = this.date.getWeek();

	this.tableRow = row;

	

	//assign the event handlers for the table cell element

	this.tableCell.onclick = this.onclick;

	this.tableCell.onmouseover = this.onmouseover;

	this.tableCell.onmouseout = this.onmouseout;

	

	//and set the CSS class of the table cell

	this.setClass();

}

//-----------------------------------------------------------------------------

CalCell.prototype.onmouseover = function () //replicate CSS :hover effect for non-supporting browsers <iehack>

{

	this.setAttribute('class',this.cellClass + ' hover');

	this.setAttribute('className',this.cellClass + ' hover');

};

//-----------------------------------------------------------------------------

CalCell.prototype.onmouseout = function () //replicate CSS :hover effect for non-supporting browsers <iehack>

{

	this.cellObj.setClass();

};

//-----------------------------------------------------------------------------

CalCell.prototype.onclick = function () 

{

	//reduce indirection:

	var cell = this.cellObj;

	var owner = cell.owner;

	if(!owner.selCurMonthOnly || cell.date.getMonth() == owner.displayMonth && cell.date.getFullYear() == owner.displayYear)

	{

		if(owner.selectMultiple == true)  //if we can select multiple cells simultaneously, add the currently selected cell's date to the selectedDates array

		{

			if(!cell.selected) //if this cell has been selected

			{

				if(owner.selectedDates.arrayIndex(cell.date) == -1) {

					owner.selectedDates.push(cell.date);

				}

			}

			else		

			{

				var tmp = owner.selectedDates; // to reduce indirection

				//if the cell has been deselected, remove it from the owner calendar's selectedDates array

				for(var i=0;i<tmp.length;i++)

				{

					if(tmp[i].getUeDay() == cell.date.getUeDay()) {

						tmp.splice(i,1);

					}

				}

			}

		}

		else //if we can only select one cell at a time

		{

			owner.selectedDates = new Array(cell.date);

			if(owner.tgt) //if there is a target element to place the value in, do so

			{

				owner.tgt.value = owner.selectedDates[0].dateFormat();

				if(owner.mode == 'popup') {

					owner.hide();

				}

			}

		}

		owner.reDraw(); //redraw the calendar cell styles to reflect the changes

	}

};

//-----------------------------------------------------------------------------

CalCell.prototype.setClass = function ()  //private: sets the CSS class of the cell based on the specified criteria

{

	if(this.selected) {

		this.cellClass = 'cell_selected';

	}

	else if(this.owner.displayMonth != this.date.getMonth() ) {

		this.cellClass = 'notmnth';	

	}

	else if(this.date.getDay() > 0 && this.date.getDay() < 6) {

		this.cellClass = 'wkday';

	}

	else {

		this.cellClass = 'wkend';

	}

	

	if(this.date.getFullYear() == this.owner.curDate.getFullYear() && this.date.getMonth() == this.owner.curDate.getMonth() && this.date.getDate() == this.owner.curDate.getDate()) {

		this.cellClass = this.cellClass + ' curdate';

	}



	this.tableCell.setAttribute('class',this.cellClass);

	this.tableCell.setAttribute('className',this.cellClass); //<iehack>

};

/*****************************************************************************/

Date.prototype.getDayOfYear = function () //returns the day of the year for this date

{

	return parseInt((this.getTime() - new Date(this.getFullYear(),0,1).getTime())/86400000 + 1);

};

//-----------------------------------------------------------------------------

Date.prototype.getWeek = function () //returns the day of the year for this date

{

	return parseInt((this.getTime() - new Date(this.getFullYear(),0,1).getTime())/604800000 + 1);

};

/*function getISOWeek()

{

	var newYear = new Date(this.getFullYear(),0,1);

	var modDay = newYear.getDay();

	if (modDay == 0) modDay=6; else modDay--;

	

	var daynum = ((Date.UTC(this.getFullYear(),this.getMonth(),this.getDate(),0,0,0) - Date.UTC(this.getFullYear()),0,1,0,0,0)) /1000/60/60/24) + 1;

	

	if (modDay < 4 ) {

	    var weeknum = Math.floor((daynum+modDay-1)/7)+1;

	}

	else {

	    var weeknum = Math.floor((daynum+modDay-1)/7);

	    if (weeknum == 0) {

	        year--;

	        var prevNewYear = new Date(this.getFullYear(),0,1);

	        var prevmodDay = prevNewYear.getDay();

	        if (prevmodDay == 0) prevmodDay = 6; else prevmodDay--;

	        if (prevmodDay < 4) weeknum = 53; else weeknum = 52;

	    }

	}

	

	return + weeknum;

}*/

//-----------------------------------------------------------------------------

Date.prototype.getUeDay = function () //returns the number of DAYS since the UNIX Epoch - good for comparing the date portion

{

	return parseInt(Math.floor((this.getTime() - this.getTimezoneOffset() * 60000)/86400000)); //must take into account the local timezone

};

//-----------------------------------------------------------------------------

Date.prototype.dateFormat = function(format)

{

	if(!format) { // the default date format to use - can be customized to the current locale

		format = 'm/d/Y';

	}

	LZ = function(x) {return(x < 0 || x > 9 ? '' : '0') + x};

	var MONTH_NAMES = new Array('January','February','March','April','May','June','July','August','September','October','November','December','Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec');

	var DAY_NAMES = new Array('Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday','Sun','Mon','Tue','Wed','Thu','Fri','Sat');

	format = format + "";

	var result="";

	var i_format=0;

	var c="";

	var token="";

	var y=this.getFullYear().toString();

	var M=this.getMonth()+1;

	var d=this.getDate();

	var E=this.getDay();

	var H=this.getHours();

	var m=this.getMinutes();

	var s=this.getSeconds();

	var yyyy,yy,MMM,MM,dd,hh,h,mm,ss,ampm,HH,H,KK,K,kk,k;

	// Convert real this parts into formatted versions

	var value = new Object();

	//if (y.length < 4) {y=''+(y-0+1900);}

	value['Y'] = y.toString();

	value['y'] = y.substring(2);

	value['n'] = M;

	value['m'] = LZ(M);

	value['F'] = MONTH_NAMES[M-1];

	value['M'] = MONTH_NAMES[M+11];

	value['j'] = d;

	value['d'] = LZ(d);

	value['D'] = DAY_NAMES[E+7];

	value['l'] = DAY_NAMES[E];

	value['G'] = H;

	value['H'] = LZ(H);

	if (H==0) {value['g']=12;}

	else if (H>12){value['g']=H-12;}

	else {value['g']=H;}

	value['h']=LZ(value['g']);

	if (H > 11) {value['a']='pm'; value['A'] = 'PM';}

	else { value['a']='am'; value['A'] = 'AM';}

	value['i']=LZ(m);

	value['s']=LZ(s);

	//construct the result string

	while (i_format < format.length) {

		c=format.charAt(i_format);

		token="";

		while ((format.charAt(i_format)==c) && (i_format < format.length)) {

			token += format.charAt(i_format++);

			}

		if (value[token] != null) { result=result + value[token]; }

		else { result=result + token; }

		}

	return result;

};

/*****************************************************************************/

Array.prototype.arrayIndex = function(searchVal,startIndex) //similar to array.indexOf() - created to fix IE deficiencies

{

	startIndex = (startIndex != null ? startIndex : 0); //default startIndex to 0, if not set

	for(var i=startIndex;i<this.length;i++)

	{

		if(searchVal == this[i]) {

			return i;

		}

	}

	return -1;

};

/*****************************************************************************/